(0:00-0:36) Introduction to Two Sample Hypothesis Testing
(0:37-1:12) Definition of Null Hypothesis and Alternative Hypothesis with Two Samples
(1:13-2:21) Examples of Null and Alternative Hypotheses with Two Samples
A claim that there is a difference in a population parameter between two samples. The alternative hypothesis is always an inequality statement.
A claim about a population difference that serves as the starting assumption for a hypothesis test. The null hypothesis usually tests that the difference in a certain parameter between two samples, such as a mean or standard deviation, is equal to zero.